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<!doctype refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN" [ |
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<!-- Fill in your name for FIRSTNAME and SURNAME. --> |
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<!-- Please adjust the date whenever revising the manpage. --> |
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<!ENTITY dhdate "<date>May 16, 2007</date>"> |
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<!-- SECTION should be 1-8, maybe w/ subsection other parameters are |
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allowed: see man(7), man(1). --> |
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<!ENTITY dhsection "<manvolnum>8</manvolnum>"> |
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<!ENTITY dhucpackage "<refentrytitle>gnt-instance</refentrytitle>"> |
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<!ENTITY dhpackage "gnt-instance"> |
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|
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<!ENTITY debian "<productname>Debian</productname>"> |
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<!ENTITY gnu "<acronym>GNU</acronym>"> |
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<!ENTITY gpl "&gnu; <acronym>GPL</acronym>"> |
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<!ENTITY footer SYSTEM "footer.sgml"> |
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]> |
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|
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<refentry> |
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<refentryinfo> |
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<copyright> |
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<year>2006</year> |
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<year>2007</year> |
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<holder>Google Inc.</holder> |
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</copyright> |
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&dhdate; |
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</refentryinfo> |
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<refmeta> |
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&dhucpackage; |
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|
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&dhsection; |
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<refmiscinfo>ganeti 1.2</refmiscinfo> |
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</refmeta> |
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<refnamediv> |
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<refname>&dhpackage;</refname> |
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|
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<refpurpose>ganeti instance administration</refpurpose> |
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</refnamediv> |
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<refsynopsisdiv> |
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<cmdsynopsis> |
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<command>&dhpackage; </command> |
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|
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<arg choice="req">command</arg> |
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<arg>arguments...</arg> |
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</cmdsynopsis> |
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</refsynopsisdiv> |
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<refsect1> |
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<title>DESCRIPTION</title> |
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|
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<para> |
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The <command>&dhpackage;</command> is used for instance |
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administration in the ganeti system. |
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</para> |
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|
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</refsect1> |
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<refsect1> |
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<title>COMMANDS</title> |
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|
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<refsect2> |
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<title>Creation/removal/querying</title> |
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|
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<refsect3> |
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<title>ADD</title> |
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<cmdsynopsis> |
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<command>add</command> |
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<arg>-s <replaceable>disksize</replaceable></arg> |
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<arg>--swap-size <replaceable>disksize</replaceable></arg> |
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<arg>-m <replaceable>memsize</replaceable></arg> |
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<sbr> |
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<arg>-o <replaceable>os-type</replaceable></arg> |
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<arg>-b <replaceable>bridge</replaceable></arg> |
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<arg>--mac <replaceable>MAC-address</replaceable></arg> |
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<arg>--hvm-boot-order <replaceable>boot-order</replaceable></arg> |
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<sbr> |
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<arg>--kernel <group choice="req"> |
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<arg>default</arg> |
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<arg><replaceable>kernel_path</replaceable></arg> |
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</group></arg> |
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<sbr> |
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<arg>--initrd <group choice="req"> |
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<arg>default</arg> |
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<arg>none</arg> |
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<arg><replaceable>initrd_path</replaceable></arg> |
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</group> </arg> |
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<sbr> |
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<arg choice="req">-t<group> |
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<arg>diskless</arg> |
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<arg>plain</arg> |
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<arg>drbd</arg> |
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</group> |
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</arg> |
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<sbr> |
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<arg choice="req">-n <replaceable>node<optional>:secondary-node</optional></replaceable></arg> |
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<arg choice="req"><replaceable>instance</replaceable></arg> |
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</cmdsynopsis> |
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|
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<para> |
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Creates a new instance on the specified |
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host. <replaceable>instance</replaceable> must be in DNS and |
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resolve to a IP in the same network as the nodes in the |
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cluster. |
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</para> |
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|
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<para> |
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The <option>-s</option> option specifies the disk size for |
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the instance, in mebibytes (defaults to |
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<constant>20480MiB</constant> = |
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<constant>20GiB</constant>). You can also use one of the |
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suffixes <literal>m</literal>, <literal>g</literal> or |
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<literal>t</literal> to specificy the exact the units used; |
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these suffixes map to mebibytes, gibibytes and tebibytes. |
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</para> |
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|
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<para> |
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The <option>--swap-size</option> option specifies the swap |
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disk size (in mebibytes) for the instance (the one presented |
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as <filename class="devicefile">/dev/sdb</filename>). The |
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default is <constant>4096MiB</constant>. As for the disk |
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size, you can specify other suffixes. |
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</para> |
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|
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<para> |
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The <option>-m</option> option specifies the memory size for |
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the instance, in mebibytes (defaults to 128 MiB). Again, you |
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can use other suffixes (e.g. <userinput>2g</userinput>). |
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</para> |
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|
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<para> |
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The <option>-o</option> options specifies the operating |
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system to be installed. The available operating systems can |
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be listed with <command>gnt-os list</command>. |
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</para> |
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|
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<para> |
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The <option>-b</option> option specifies the bridge to which the |
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instance will be connected. (defaults to the cluster-wide default |
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bridge specified at cluster initialization time). |
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</para> |
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|
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<para> |
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The <option>--mac</option> option specifies the MAC address |
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of the ethernet interface for the instance. If this option |
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is not specified, a new MAC address is generated randomly with |
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the configured MAC prefix. The randomly generated MAC |
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address is guaranteed to be unique among the instances of |
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this cluster. |
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</para> |
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|
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<para> |
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The <option>--hvm-boot-order</option> option specifies the |
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boot device order for Xen HVM instances. The boot order is a |
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string of letters listing the boot devices, with valid |
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device letters being: |
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</para> |
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|
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<para> |
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<variablelist> |
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<varlistentry> |
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<term>a</term> |
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<listitem> |
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<para> |
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floppy drive |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>c</term> |
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<listitem> |
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<para> |
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hard disk |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>d</term> |
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<listitem> |
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<para> |
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CDROM drive |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>n</term> |
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<listitem> |
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<para> |
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network boot (PXE) |
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</para> |
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</listitem> |
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</varlistentry> |
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</variablelist> |
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</para> |
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|
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<para> |
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The option is only relevant for Xen HVM instances and |
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ignored by all other instances types. |
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</para> |
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|
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<para> |
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The <option>--kernel</option> options allows the instance to |
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use a custom kernel (if a filename is passed) or to use the |
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default kernel (<filename>@CUSTOM_XEN_KERNEL@</filename>), if the |
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string <constant>default</constant> is passed. |
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</para> |
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|
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<para> |
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The <option>--initrd</option> option is similar: it allows |
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the instance to use a custom initrd (if a filename is |
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passed) or to use the default initrd |
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(<filename>@CUSTOM_XEN_INITRD@</filename>), if the string |
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<constant>default</constant> is passed, or to disable the |
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use of an initrd, if the string <constant>none</constant> is |
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passed. Note that in the case the instance is set to use the |
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default initrd and it doesn't exist, it will be silently |
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ignored; if the instance is set to use a custom initrd and |
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it doesn't exist, this will be treated as an error and will |
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prevent the startup of the instance. |
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</para> |
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|
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<para> |
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The <option>-t</option> options specifies the disk layout type for |
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the instance. The available choices are: |
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<variablelist> |
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<varlistentry> |
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<term>diskless</term> |
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<listitem> |
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<para> |
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This creates an instance with no disks. Its useful for |
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testing only (or other special cases). |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>plain</term> |
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<listitem> |
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<para>Disk devices will be logical volumes.</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>drbd</term> |
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<listitem> |
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<para> |
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Disk devices will be drbd (version 8.x) on top of |
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lvm volumes. |
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</para> |
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</listitem> |
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</varlistentry> |
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</variablelist> |
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</para> |
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|
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<para> |
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The optional second value of the <option>--node</option> is used for |
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the remote raid template type and specifies the remote node. |
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</para> |
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|
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<para> |
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If you do not want gnt-instance to wait for the disk mirror |
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to be synced, use the <option>--no-wait-for-sync</option> |
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option. |
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</para> |
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|
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<para> |
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Example: |
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<screen> |
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# gnt-instance add -t plain -s 30g -m 512 -o debian-etch \ |
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-n node1.example.com instance1.example.com |
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# gnt-instance add -t drbd -s 30g -m 512 -o debian-etch \ |
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-n node1.example.com:node2.example.com instance2.example.com |
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</screen> |
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</para> |
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</refsect3> |
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|
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<refsect3> |
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<title>REMOVE</title> |
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|
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<cmdsynopsis> |
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<command>remove</command> |
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<arg>--ignore-failures</arg> |
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<arg choice="req"><replaceable>instance</replaceable></arg> |
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</cmdsynopsis> |
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|
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<para> |
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Remove an instance. This will remove all data from the |
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instance and there is <emphasis>no way back</emphasis>. If |
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you are not sure if you use an instance again, use |
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<command>shutdown</command> first and leave it in the |
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shutdown state for a while. |
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|
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</para> |
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|
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<para> |
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The <option>--ignore-failures</option> option will cause the |
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removal to proceed even in the presence of errors during the |
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removal of the instance (e.g. during the shutdown or the |
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disk removal). If this option is not given, the command will |
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stop at the first error. |
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</para> |
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|
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<para> |
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Example: |
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<screen> |
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# gnt-instance remove instance1.example.com |
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</screen> |
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</para> |
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</refsect3> |
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|
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<refsect3> |
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<title>LIST</title> |
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|
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<cmdsynopsis> |
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<command>list</command> |
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<arg>--no-headers</arg> |
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<arg>--separator=<replaceable>SEPARATOR</replaceable></arg> |
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<arg>-o <replaceable>FIELD,...</replaceable></arg> |
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</cmdsynopsis> |
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|
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<para> |
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Shows the currently configured instances with memory usage, |
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disk usage, the node they are running on, and the CPU time, |
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counted in seconds, used by each instance since its latest |
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restart. |
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</para> |
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|
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<para> |
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The <option>--no-headers</option> option will skip the |
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initial header line. The <option>--separator</option> option |
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takes an argument which denotes what will be used between |
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the output fields. Both these options are to help scripting. |
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</para> |
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|
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<para> |
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The <option>-o</option> option takes a comma-separated list |
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of output fields. The available fields and their meaning |
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are: |
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<variablelist> |
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<varlistentry> |
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<term>name</term> |
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<listitem> |
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<simpara>the instance name</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>os</term> |
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<listitem> |
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<simpara>the OS of the instance</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>pnode</term> |
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<listitem> |
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<simpara>the primary node of the instance</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>snodes</term> |
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<listitem> |
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<simpara>comma-separated list of secondary nodes for the |
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instance; usually this will be just one node</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>admin_state</term> |
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<listitem> |
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<simpara>the desired state of the instance (either "yes" |
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or "no" denoting the instance should run or |
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not)</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>admin_ram</term> |
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<listitem> |
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<simpara>the desired memory for the instance</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>disk_template</term> |
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<listitem> |
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<simpara>the disk template of the instance</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>oper_state</term> |
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<listitem> |
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<simpara>the actual state of the instance; can be |
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one of the values "running", "stopped", "(node |
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down)"</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>status</term> |
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<listitem> |
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<simpara>combined form of admin_state and oper_stat; |
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this can be one of: |
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<computeroutput>ERROR_nodedown</computeroutput> if the |
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node of the instance is down, |
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<computeroutput>ERROR_down</computeroutput> if the |
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instance should run but is down, |
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<computeroutput>ERROR_up</computeroutput> if the |
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instance should be stopped but is actually running, |
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<computeroutput>ADMIN_down</computeroutput> if the |
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instance has been stopped (and is stopped) and |
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<computeroutput>running</computeroutput> if the |
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instance is set to be running (and is |
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running)</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>oper_ram</term> |
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<listitem> |
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<simpara>the actual memory usage of the instance as seen |
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by the hypervisor</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>ip</term> |
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<listitem> |
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<simpara>the ip address ganeti recognizes as associated with |
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the instance interface</simpara> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term>mac</term> |
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<listitem> |
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<simpara>the instance interface MAC address</simpara> |
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</listitem> |
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</varlistentry> |
425 |
<varlistentry> |
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<term>bridge</term> |
427 |
<listitem> |
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<simpara>bridge the instance is connected to |
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</simpara> |
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</listitem> |
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</varlistentry> |
432 |
<varlistentry> |
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<term>sda_size</term> |
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<listitem> |
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<simpara>the size of the instance's first disk</simpara> |
436 |
</listitem> |
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</varlistentry> |
438 |
<varlistentry> |
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<term>sdb_size</term> |
440 |
<listitem> |
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<simpara>the size of the instance's second disk</simpara> |
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</listitem> |
443 |
</varlistentry> |
444 |
<varlistentry> |
445 |
<term>vcpus</term> |
446 |
<listitem> |
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<simpara>the number of VCPUs allocated to the |
448 |
instance</simpara> |
449 |
</listitem> |
450 |
</varlistentry> |
451 |
</variablelist> |
452 |
</para> |
453 |
|
454 |
<para> |
455 |
There is a subtle grouping about the available output |
456 |
fields: all fields except for <option>oper_state</option> |
457 |
and <option>oper_ram</option> are configuration value and |
458 |
not run-time values. So if you don't select any of the |
459 |
<option>oper_*</option> fields, the query will be satisfied |
460 |
instantly from the cluster configuration, without having to |
461 |
ask the remote nodes for the data. This can be helpful for |
462 |
big clusters when you only want some data and it makes sense |
463 |
to specify a reduced set of output fields. |
464 |
</para> |
465 |
|
466 |
<para>The default output field list is: |
467 |
<simplelist type="inline"> |
468 |
<member>name</member> |
469 |
<member>os</member> |
470 |
<member>pnode</member> |
471 |
<member>admin_state</member> |
472 |
<member>oper_state</member> |
473 |
<member>oper_ram</member> |
474 |
</simplelist>. |
475 |
</para> |
476 |
</refsect3> |
477 |
|
478 |
<refsect3> |
479 |
<title>INFO</title> |
480 |
|
481 |
<cmdsynopsis> |
482 |
<command>info</command> |
483 |
<arg rep="repeat"><replaceable>instance</replaceable></arg> |
484 |
</cmdsynopsis> |
485 |
|
486 |
<para> |
487 |
Show detailed information about the (given) instances. This |
488 |
is different from <command>list</command> as it shows |
489 |
detailed data about the instance's disks (especially useful |
490 |
for remote raid templates). |
491 |
</para> |
492 |
</refsect3> |
493 |
|
494 |
<refsect3> |
495 |
<title>MODIFY</title> |
496 |
|
497 |
<cmdsynopsis> |
498 |
<command>modify</command> |
499 |
<arg choice="opt">-m <replaceable>memsize</replaceable></arg> |
500 |
<arg choice="opt">-p <replaceable>vcpus</replaceable></arg> |
501 |
<arg choice="opt">-i <replaceable>ip</replaceable></arg> |
502 |
<arg choice="opt">-b <replaceable>bridge</replaceable></arg> |
503 |
<arg choice="opt">--mac <replaceable>MAC-address</replaceable></arg> |
504 |
<arg>--hvm-boot-order <replaceable>boot-order</replaceable></arg> |
505 |
<sbr> |
506 |
<arg>--kernel <group choice="req"> |
507 |
<arg>default</arg> |
508 |
<arg><replaceable>kernel_path</replaceable></arg> |
509 |
</group></arg> |
510 |
<sbr> |
511 |
<arg>--initrd <group choice="req"> |
512 |
<arg>default</arg> |
513 |
<arg>none</arg> |
514 |
<arg><replaceable>initrd_path</replaceable></arg> |
515 |
</group> </arg> |
516 |
<sbr> |
517 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
518 |
</cmdsynopsis> |
519 |
|
520 |
<para> |
521 |
Modify the memory size, number of vcpus, ip address, MAC |
522 |
address and/or bridge for an instance. |
523 |
</para> |
524 |
|
525 |
<para> |
526 |
The memory size is given in MiB. Note that you need to give |
527 |
at least one of the arguments, otherwise the command |
528 |
complains. |
529 |
</para> |
530 |
|
531 |
<para> |
532 |
The <option>--kernel</option>, <option>--initrd</option> |
533 |
and <option>--hvm-boot-order</option> |
534 |
options are described in the <command>add</command> command. |
535 |
</para> |
536 |
|
537 |
<para> |
538 |
Additionally, the HVM boot order can be reset to the default |
539 |
values by using <option>--hvm-boot-order=default</option>. |
540 |
</para> |
541 |
|
542 |
<para> |
543 |
All the changes take effect at the next restart. If the |
544 |
instance is running, there is no effect on the instance. |
545 |
</para> |
546 |
</refsect3> |
547 |
|
548 |
<refsect3> |
549 |
<title>REINSTALL</title> |
550 |
|
551 |
<cmdsynopsis> |
552 |
<command>reinstall</command> |
553 |
<arg choice="opt">-o <replaceable>os-type</replaceable></arg> |
554 |
<arg choice="opt">-f <replaceable>force</replaceable></arg> |
555 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
556 |
</cmdsynopsis> |
557 |
|
558 |
<para> |
559 |
Reinstalls the operating system on the given instance. The instance |
560 |
must be stopped when running this command. If the |
561 |
<option>--os-type</option> is specified, the operating system is |
562 |
changed. |
563 |
</para> |
564 |
</refsect3> |
565 |
|
566 |
<refsect3> |
567 |
<title>RENAME</title> |
568 |
|
569 |
<cmdsynopsis> |
570 |
<command>rename</command> |
571 |
<arg>--no-ip-check</arg> |
572 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
573 |
<arg choice="req"><replaceable>new_name</replaceable></arg> |
574 |
</cmdsynopsis> |
575 |
|
576 |
<para> |
577 |
Renames the given instance. The instance must be stopped |
578 |
when running this command. The requirements for the new name |
579 |
are the same as for adding an instance: the new name must be |
580 |
resolvable and the IP it resolves to must not be reachable |
581 |
(in order to prevent duplicate IPs the next time the |
582 |
instance is started). The IP test can be skipped if the |
583 |
<option>--no-ip-check</option> option is passed. |
584 |
</para> |
585 |
</refsect3> |
586 |
|
587 |
</refsect2> |
588 |
|
589 |
<refsect2> |
590 |
<title>Starting/stopping/connecting to console</title> |
591 |
|
592 |
<refsect3> |
593 |
<title>STARTUP</title> |
594 |
|
595 |
<cmdsynopsis> |
596 |
<command>startup</command> |
597 |
<arg>--extra=<replaceable>PARAMS</replaceable></arg> |
598 |
<arg>--force</arg> |
599 |
<sbr> |
600 |
<group choice="opt"> |
601 |
<arg>--instance</arg> |
602 |
<arg>--node</arg> |
603 |
<arg>--primary</arg> |
604 |
<arg>--secondary</arg> |
605 |
<arg>--all</arg> |
606 |
</group> |
607 |
<sbr> |
608 |
<arg choice="opt" |
609 |
rep="repeat"><replaceable>name</replaceable></arg> |
610 |
</cmdsynopsis> |
611 |
|
612 |
<para> |
613 |
Starts one or more instances, depending on the following |
614 |
options. The four available modes are: |
615 |
<variablelist> |
616 |
<varlistentry> |
617 |
<term><option>--instance</option></term> |
618 |
<listitem> |
619 |
<simpara>will start the instances given as arguments |
620 |
(at least one argument required); this is the default |
621 |
selection</simpara> |
622 |
</listitem> |
623 |
</varlistentry> |
624 |
<varlistentry> |
625 |
<term>--node</term> |
626 |
<listitem> |
627 |
<simpara>will start the instances who have the given |
628 |
node as either primary or secondary</simpara> |
629 |
</listitem> |
630 |
</varlistentry> |
631 |
<varlistentry> |
632 |
<term><option>--primary</option></term> |
633 |
<listitem> |
634 |
<simpara>will start all instances whose primary node |
635 |
is in the list of nodes passed as arguments (at least |
636 |
one node required)</simpara> |
637 |
</listitem> |
638 |
</varlistentry> |
639 |
<varlistentry> |
640 |
<term><option>--secondary</option></term> |
641 |
<listitem> |
642 |
<simpara>will start all instances whose secondary node |
643 |
is in the list of nodes passed as arguments (at least |
644 |
one node required)</simpara> |
645 |
</listitem> |
646 |
</varlistentry> |
647 |
<varlistentry> |
648 |
<term>--all</term> |
649 |
<listitem> |
650 |
<simpara>will start all instances in the cluster (no |
651 |
arguments accepted)</simpara> |
652 |
</listitem> |
653 |
</varlistentry> |
654 |
</variablelist> |
655 |
</para> |
656 |
|
657 |
<para> |
658 |
Note that although you can pass more than one selection |
659 |
option, the last one wins, so in order to guarantee the |
660 |
desired result, don't pass more than one such option. |
661 |
</para> |
662 |
|
663 |
<para> |
664 |
The <option>--extra</option> option is used to pass |
665 |
additional argument to the instance's kernel for this start |
666 |
only. Currently there is no way to specify a persistent set |
667 |
of arguments (beside the one hardcoded). Note that this may |
668 |
not apply to all virtualization types. |
669 |
</para> |
670 |
|
671 |
<para> |
672 |
Use <option>--force</option> to start even if secondary disks are |
673 |
failing. |
674 |
</para> |
675 |
|
676 |
<para> |
677 |
Example: |
678 |
<screen> |
679 |
# gnt-instance start instance1.example.com |
680 |
# gnt-instance start --extra single test1.example.com |
681 |
# gnt-instance start --node node1.example.com node2.example.com |
682 |
# gnt-instance start --all |
683 |
</screen> |
684 |
</para> |
685 |
</refsect3> |
686 |
|
687 |
<refsect3> |
688 |
<title>SHUTDOWN</title> |
689 |
|
690 |
<cmdsynopsis> |
691 |
<command>shutdown</command> |
692 |
<sbr> |
693 |
<group choice="opt"> |
694 |
<arg>--instance</arg> |
695 |
<arg>--node</arg> |
696 |
<arg>--primary</arg> |
697 |
<arg>--secondary</arg> |
698 |
<arg>--all</arg> |
699 |
</group> |
700 |
<sbr> |
701 |
|
702 |
<arg choice="opt" |
703 |
rep="repeat"><replaceable>name</replaceable></arg> |
704 |
</cmdsynopsis> |
705 |
|
706 |
<para> |
707 |
Stops one or more instances. If the instance cannot be |
708 |
cleanly stopped during a hardcoded interval (currently 2 |
709 |
minutes), it will forcibly stop the instance (equivalent to |
710 |
switching off the power on a physical machine). |
711 |
</para> |
712 |
|
713 |
<para> |
714 |
The <option>--instance</option>, <option>--node</option>, |
715 |
<option>--primary</option>, <option>--secondary</option> and |
716 |
<option>--all</option> options are similar as for the |
717 |
<command>startup</command> command and they influence the |
718 |
actual instances being shutdown. |
719 |
</para> |
720 |
|
721 |
<para> |
722 |
Example: |
723 |
<screen> |
724 |
# gnt-instance shutdown instance1.example.com |
725 |
# gnt-instance shutdown --all |
726 |
</screen> |
727 |
</para> |
728 |
</refsect3> |
729 |
|
730 |
<refsect3> |
731 |
<title>REBOOT</title> |
732 |
|
733 |
<cmdsynopsis> |
734 |
<command>reboot</command> |
735 |
<sbr> |
736 |
<arg>--extra=<replaceable>PARAMS</replaceable></arg> |
737 |
<sbr> |
738 |
<arg>--type=<replaceable>REBOOT-TYPE</replaceable></arg> |
739 |
<sbr> |
740 |
<arg>--ignore-secondaries</arg> |
741 |
<sbr> |
742 |
<arg>--force-multiple</arg> |
743 |
<sbr> |
744 |
<group choice="opt"> |
745 |
<arg>--instance</arg> |
746 |
<arg>--node</arg> |
747 |
<arg>--primary</arg> |
748 |
<arg>--secondary</arg> |
749 |
<arg>--all</arg> |
750 |
</group> |
751 |
<sbr> |
752 |
|
753 |
<arg choice="opt" |
754 |
rep="repeat"><replaceable>name</replaceable></arg> |
755 |
</cmdsynopsis> |
756 |
|
757 |
<para> |
758 |
Reboots one or more instances. The type of reboot depends on |
759 |
the value of <option>--type</option>. A soft reboot does a |
760 |
hypervisor reboot, a hard reboot does a instance stop, |
761 |
recreates the hypervisor config for the instance and |
762 |
starts the instance. A full reboot does the equivalent |
763 |
of <command>gnt-instance shutdown && gnt-instance |
764 |
startup</command>. The default is soft reboot. |
765 |
</para> |
766 |
|
767 |
<para> |
768 |
For the hard reboot the option |
769 |
<option>--ignore-secondaries</option> ignores errors for the |
770 |
secondary node while re-assembling the instance disks. |
771 |
</para> |
772 |
|
773 |
<para> |
774 |
The <option>--instance</option>, <option>--node</option>, |
775 |
<option>--primary</option>, <option>--secondary</option> and |
776 |
<option>--all</option> options are similar as for the |
777 |
<command>startup</command> command and they influence the |
778 |
actual instances being rebooted. |
779 |
</para> |
780 |
|
781 |
<para> |
782 |
Use the <option>--force-multiple</option> option to keep |
783 |
gnt-instance from asking for confirmation when more than one |
784 |
instance is affected. |
785 |
</para> |
786 |
|
787 |
<para> |
788 |
Example: |
789 |
<screen> |
790 |
# gnt-instance reboot instance1.example.com |
791 |
# gnt-instance reboot --type=full instance1.example.com |
792 |
</screen> |
793 |
</para> |
794 |
</refsect3> |
795 |
|
796 |
<refsect3> |
797 |
<title>CONSOLE</title> |
798 |
<cmdsynopsis> |
799 |
<command>console</command> |
800 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
801 |
</cmdsynopsis> |
802 |
|
803 |
<para> |
804 |
Connects to the console of the given instance. If the instance |
805 |
is not up, an error is returned. |
806 |
</para> |
807 |
|
808 |
<para> |
809 |
Example: |
810 |
<screen> |
811 |
# gnt-instance console instance1.example.com |
812 |
</screen> |
813 |
</para> |
814 |
</refsect3> |
815 |
|
816 |
</refsect2> |
817 |
|
818 |
<refsect2> |
819 |
<title>Disk management</title> |
820 |
|
821 |
<refsect3> |
822 |
<title>REPLACE-DISKS</title> |
823 |
|
824 |
<cmdsynopsis> |
825 |
<command>replace-disks</command> |
826 |
<arg choice="opt">--new-secondary <replaceable>NODE</replaceable></arg> |
827 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
828 |
</cmdsynopsis> |
829 |
|
830 |
<cmdsynopsis> |
831 |
<command>replace-disks</command> |
832 |
<arg choice="opt">-s</arg> |
833 |
<arg choice="req">--new-secondary <replaceable>NODE</replaceable></arg> |
834 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
835 |
</cmdsynopsis> |
836 |
|
837 |
<cmdsynopsis> |
838 |
<command>replace-disks</command> |
839 |
<group> |
840 |
<arg choice="req">-s</arg> |
841 |
<arg choice="req">-p</arg> |
842 |
</group> |
843 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
844 |
</cmdsynopsis> |
845 |
|
846 |
<para> |
847 |
This command is a generalized form for adding and replacing |
848 |
disks. |
849 |
</para> |
850 |
|
851 |
<para> |
852 |
The first form is usable with the |
853 |
<literal>remote_raid1</literal> disk template. This will |
854 |
replace the disks on both the primary and secondary node, |
855 |
and optionally will change the secondary node to a new one |
856 |
if you pass the <option>--new-secondary</option> option. |
857 |
</para> |
858 |
|
859 |
<para> |
860 |
The second and third forms are usable with the |
861 |
<literal>drbd</literal> disk template. The second form will |
862 |
do a secondary replacement, but as opposed to the |
863 |
<literal>remote_raid1</literal> will not replace the disks |
864 |
on the primary, therefore it will execute faster. The third |
865 |
form will replace the disks on either the primary |
866 |
(<option>-p</option>) or the secondary (<option>-s</option>) |
867 |
node of the instance only, without changing the node. |
868 |
</para> |
869 |
|
870 |
</refsect3> |
871 |
|
872 |
<refsect3> |
873 |
<title>ACTIVATE-DISKS</title> |
874 |
|
875 |
<cmdsynopsis> |
876 |
<command>activate-disks</command> |
877 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
878 |
</cmdsynopsis> |
879 |
<para> |
880 |
Activates the block devices of the given instance. If |
881 |
successful, the command will show the location and name of |
882 |
the block devices: |
883 |
<screen> |
884 |
node1.example.com:sda:/dev/md0 |
885 |
node1.example.com:sdb:/dev/md1 |
886 |
</screen> |
887 |
|
888 |
In this example, <emphasis>node1.example.com</emphasis> is |
889 |
the name of the node on which the devices have been |
890 |
activated. The <emphasis>sda</emphasis> and |
891 |
<emphasis>sdb</emphasis> are the names of the block devices |
892 |
inside the instance. <emphasis>/dev/md0</emphasis> and |
893 |
<emphasis>/dev/md1</emphasis> are the names of the block |
894 |
devices as visible on the node. |
895 |
</para> |
896 |
|
897 |
<para> |
898 |
Note that it is safe to run this command while the instance |
899 |
is already running. |
900 |
</para> |
901 |
</refsect3> |
902 |
|
903 |
<refsect3> |
904 |
<title>DEACTIVATE-DISKS</title> |
905 |
|
906 |
<cmdsynopsis> |
907 |
<command>deactivate-disks</command> |
908 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
909 |
</cmdsynopsis> |
910 |
<para> |
911 |
De-activates the block devices of the given instance. Note |
912 |
that if you run this command for a remote raid instance |
913 |
type, while it is running, it will not be able to shutdown |
914 |
the block devices on the primary node, but it will shutdown |
915 |
the block devices on the secondary nodes, thus breaking the |
916 |
replication. |
917 |
</para> |
918 |
|
919 |
</refsect3> |
920 |
|
921 |
</refsect2> |
922 |
|
923 |
<refsect2> |
924 |
<title>Recovery</title> |
925 |
|
926 |
<refsect3> |
927 |
<title>FAILOVER</title> |
928 |
|
929 |
<cmdsynopsis> |
930 |
<command>failover</command> |
931 |
<arg>-f</arg> |
932 |
<arg>--ignore-consistency</arg> |
933 |
<arg choice="req"><replaceable>instance</replaceable></arg> |
934 |
</cmdsynopsis> |
935 |
|
936 |
<para> |
937 |
Failover will fail the instance over its secondary |
938 |
node. This works only for instances having a remote raid |
939 |
disk layout. |
940 |
</para> |
941 |
|
942 |
<para> |
943 |
Normally the failover will check the consistency of the |
944 |
disks before failing over the instance. If you are trying to |
945 |
migrate instances off a dead node, this will fail. Use the |
946 |
<option>--ignore-consistency</option> option for this |
947 |
purpose. Note that this option can be dangerous as errors in |
948 |
shutting down the instance will be ignored, resulting in |
949 |
possibly having the instance running on two machines in |
950 |
parallel (on disconnected DRBD drives). |
951 |
</para> |
952 |
|
953 |
<para> |
954 |
Example: |
955 |
<screen> |
956 |
# gnt-instance failover instance1.example.com |
957 |
</screen> |
958 |
</para> |
959 |
</refsect3> |
960 |
|
961 |
</refsect2> |
962 |
|
963 |
<refsect2> |
964 |
<title>TAGS</title> |
965 |
|
966 |
<refsect3> |
967 |
<title>ADD-TAGS</title> |
968 |
|
969 |
<cmdsynopsis> |
970 |
<command>add-tags</command> |
971 |
<arg choice="opt">--from <replaceable>file</replaceable></arg> |
972 |
<arg choice="req"><replaceable>instancename</replaceable></arg> |
973 |
<arg choice="req" |
974 |
rep="repeat"><replaceable>tag</replaceable></arg> |
975 |
</cmdsynopsis> |
976 |
|
977 |
<para> |
978 |
Add tags to the given instance. If any of the tags contains |
979 |
invalid characters, the entire operation will abort. |
980 |
</para> |
981 |
<para> |
982 |
If the <option>--from</option> option is given, the list of |
983 |
tags will be extended with the contents of that file (each |
984 |
line becomes a tag). In this case, there is not need to pass |
985 |
tags on the command line (if you do, both sources will be |
986 |
used). A file name of - will be interpreted as stdin. |
987 |
</para> |
988 |
</refsect3> |
989 |
|
990 |
<refsect3> |
991 |
<title>LIST-TAGS</title> |
992 |
|
993 |
<cmdsynopsis> |
994 |
<command>list-tags</command> |
995 |
<arg choice="req"><replaceable>instancename</replaceable></arg> |
996 |
</cmdsynopsis> |
997 |
|
998 |
<para>List the tags of the given instance.</para> |
999 |
</refsect3> |
1000 |
|
1001 |
<refsect3> |
1002 |
<title>REMOVE-TAGS</title> |
1003 |
<cmdsynopsis> |
1004 |
<command>remove-tags</command> |
1005 |
<arg choice="opt">--from <replaceable>file</replaceable></arg> |
1006 |
<arg choice="req"><replaceable>instancename</replaceable></arg> |
1007 |
<arg choice="req" |
1008 |
rep="repeat"><replaceable>tag</replaceable></arg> |
1009 |
</cmdsynopsis> |
1010 |
|
1011 |
<para> |
1012 |
Remove tags from the given instance. If any of the tags are |
1013 |
not existing on the node, the entire operation will abort. |
1014 |
</para> |
1015 |
|
1016 |
<para> |
1017 |
If the <option>--from</option> option is given, the list of |
1018 |
tags will be extended with the contents of that file (each |
1019 |
line becomes a tag). In this case, there is not need to pass |
1020 |
tags on the command line (if you do, both sources will be |
1021 |
used). A file name of - will be interpreted as stdin. |
1022 |
</para> |
1023 |
</refsect3> |
1024 |
|
1025 |
</refsect2> |
1026 |
|
1027 |
</refsect1> |
1028 |
|
1029 |
&footer; |
1030 |
|
1031 |
</refentry> |
1032 |
|
1033 |
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1034 |
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1035 |
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1036 |
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1048 |
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